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Updated: Apr 28, 2026

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Efficient frequency doubling at 399 nm.

Marco Pizzocaro, Davide Calonico, Pablo Cancio Pastor

    Applied Optics
    |June 13, 2014
    PubMed
    Summary
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    Researchers developed a high-power, narrow-linewidth laser at 399 nm for cooling and trapping ytterbium atoms. This reliable laser source achieves 1.0 W output with 80% efficiency using frequency doubling.

    Area of Science:

    • Atomic, Molecular, and Optical Physics
    • Laser Physics and Photonics

    Background:

    • Precise laser sources are crucial for atomic manipulation.
    • Cooling and trapping ytterbium atoms requires specific wavelengths.

    Purpose of the Study:

    • To develop a reliable, high-power, narrow-linewidth laser source at 399 nm.
    • To enable efficient cooling and trapping of ytterbium atoms.

    Main Methods:

    • Utilized a continuous-wave titanium-sapphire laser operating at 798 nm.
    • Employed frequency doubling with a lithium triborate crystal within an enhancement cavity.

    Main Results:

    • Achieved a stable laser output of 1.0 W at 399 nm.
    • Obtained the 399 nm light from 1.3 W of infrared light.

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  • Demonstrated a high conversion efficiency of 80%.

    • Conclusions:

    • The developed 399 nm laser system is a reliable and powerful tool.
    • This laser source is highly suitable for applications in cooling and trapping ytterbium atoms.